Baked Egg White Muffin
Fluffy, protein-packed egg white muffins loaded with colorful bell peppers and spinach, baked to golden perfection in a muffin tin. A grab-and-go breakfast that's light, airy, and endlessly customizable with your favorite veggies.
For 4 servings
- prep
Preheat oven and prepare the muffin tin.
Preheat oven to 350°F (175°C). Lightly grease 8 cups of a standard muffin tin with oil, wiping away any excess.
TIPUse a paper towel to spread a thin, even layer of oil — too much oil pools and makes the bottoms greasy. - mix
Whisk egg whites and seasonings.
In a medium mixing bowl, whisk the egg whites with salt, black pepper, and garlic powder until slightly frothy and fully combined, about 30 seconds.
- mix
Fold in the vegetables and cheese.
Add the diced bell pepper, chopped spinach, and minced onion to the egg white mixture. Gently fold everything together with a spatula until the vegetables are evenly distributed.
TIPDon't overmix — gentle folding keeps the egg whites light and airy. - prep
Fill the muffin cups.
Divide the egg mixture evenly among the 8 greased muffin cups, filling each about three-quarters full. Sprinkle the shredded cheddar cheese equally over the tops.
- bake · ~18 min
Bake until set and lightly golden.
Bake at 350°F for 16-18 minutes, until the muffins are puffed, set in the center, and the tops are lightly golden. The internal temperature should reach 160°F.
TIPThe muffins will puff up dramatically in the oven and then settle slightly as they cool — this is normal. - rest · ~5 min
Cool briefly in the pan before removing.
Let the muffins rest in the tin for 3-5 minutes. Run a thin spatula or butter knife around the edges to loosen, then transfer to a cooling rack or plate.
TIPCooling in the pan lets the muffins set further and makes removal clean and easy. - serve
Serve warm or cool completely for meal prep.
Enjoy 2 muffins per serving while still warm, or let them cool completely before refrigerating in an airtight container for up to 4 days.
What to keep in mind.
6 tips from the recipe — small details that make a real difference to the final dish.
- 1Whisk the egg whites until frothy to incorporate air for a fluffier texture.
- 2Squeeze excess moisture from thawed frozen spinach to prevent soggy muffins.
- 3Use a silicone muffin pan for effortless release without greasing.
- 4Let muffins cool completely before storing to avoid condensation and sogginess.
- 5Fill cups only ¾ full; egg whites puff significantly during baking.
- 6Test doneness by inserting a toothpick — it should come out clean.
Adapt it for your goals.
Dairy-free
Omit the cheddar cheese and add 2 tablespoons of nutritional yeast for a cheesy, dairy-free alternative that still offers a savory umami boost.
high proteinHigh-protein
Add ¼ cup of crumbled turkey sausage or cooked diced chicken to the mixture for an extra 10g of protein per serving — ideal for post-workout recovery.
low carbLow-carb
Replace the bell pepper with finely chopped mushrooms and zucchini to reduce net carbs while maintaining a hearty, veggie-packed bite.
mexicanMexican
Swap the spinach for chopped cilantro and the cheddar for crumbled queso fresco, then add a pinch of cumin and smoked paprika for a south-of-the-border twist.
jainJain
Use only bell pepper and spinach (no onion or garlic powder), and replace the cheddar with a plant-based cheese for a Jain-friendly version that respects dietary restrictions.
Why this is on our healthy list.
Low in Calories
Egg whites are naturally low in calories and fat, making these muffins a light yet satisfying breakfast that supports weight management.
High in Protein
Each muffin provides a concentrated dose of lean protein from egg whites, which helps build and repair muscle tissue.
Rich in Vitamin C
Bell peppers and spinach are excellent sources of antioxidant vitamin C, supporting immune function and collagen production.
Packed with Iron
Spinach contributes a good amount of plant-based iron, which is essential for red blood cell production and oxygen transport.
Frequently asked questions
Yes, substitute 4 whole eggs (or 5 for extra richness) for the 8 egg whites — the yolk will make the muffins denser and more custard-like, with a golden color.
